Viscosity will open a new "Update Available" window upon every "check". It would be expected that the previous "Update Available" window gets closed OR updated instead.

You can simply reproduce this bug by clicking multiple times on the "Check Now" button under "Preferences - General - Updates", which will open an unlimited number of "Update Available" windows (when an update is available of course).

I noticed this bug because I have a workstation which I use every so often, with Viscosity running, and after a few weeks without attending to this workstation I would be greeted by dozens of "Update Available" windows to close.

Thank you to all the team at SparkLabs for this amazing VPN client which I have now been using since more then 4 years (and can't stop recommending it)!